Question

The isosceles triangle has a perimeter of 7.5 m

Which equation can be used to find the value of x if the shortest side, y measures 2.1 m

Answer 1

option 4: 2.1 + 2x = 7.5

Answer 2

The value of x is 2.7 and the equation used for finding the value of x is 7.5 = 2.1 + 2x.

Explanation:

As given

The isosceles triangle has a perimeter of 7.5 m .

if the shortest side, y measures 2.1 m

In the isosceles triangle two sides of the triangle are equal .

Let us assume that the two equal sides each of length x .

Thus

Perimeter = Sum of all sides

Perimeter = x + x + y

7.5 = 2x + 2.1

7.5 - 2.1 = 2x

5.4 = 2x

`x = (5.4)/(2)`

x = 2.7 m

Therefore the value of x is 2.7 and the equation used for finding the value of x is 7.5 = 2.1 +2x.